US PATENT SUBCLASS 283 / 39
.~ Blank position markers

Current as of: June, 1999
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283 /   HD   PRINTED MATTER

36  DF  INDEXED {4}
39.~ Blank position markers {1}
40  DF  .~.~> Book

DEFINITION

Classification: 283/39

The indicia which give specific index value to some of the means for marking the position of some of the items of information being placed elsewhere than upon the position-markers themselves.